Java Log4j2 找不到 Spring Boot 的日志记录实现
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Log4j2 could not find a logging implementation with Spring Boot
提问by saiboten
I'm getting this error trying to use log4j2 with spring boot.
我在尝试将 log4j2 与 spring boot 一起使用时遇到此错误。
ERROR StatusLogger Log4j2 could not find a logging implementation.
Please add log4j-core to the classpath. Using SimpleLogger to log to the console...
I'm have followed this guide: http://docs.spring.io/spring-boot/docs/current/reference/html/howto-logging.html#howto-configure-log4j-for-logging- and also added the two log4j2-dependencies from https://logging.apache.org/log4j/2.x/maven-artifacts.html
我遵循了本指南：http: //docs.spring.io/spring-boot/docs/current/reference/html/howto-logging.html#howto-configure-log4j-for-logging- 并添加了来自https://logging.apache.org/log4j/2.x/maven-artifacts.html 的两个 log4j2 依赖项
My dependency:tree looks like this:
我的依赖：树看起来像这样：
[INFO] --- maven-dependency-plugin:2.10:tree (default-cli) @ musikkjulekalender ---
[INFO] no.saiboten:musikkjulekalender:war:1.0-SNAPSHOT
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:1.4.0.RELEASE:compile
[INFO] | +- org.hibernate:hibernate-validator:jar:5.2.4.Final:compile
[INFO] | | +- javax.validation:validation-api:jar:1.1.0.Final:compile
[INFO] | | +- org.jboss.logging:jboss-logging:jar:3.3.0.Final:compile
[INFO] | | \- com.fasterxml:classmate:jar:1.3.1:compile
[INFO] | +- org.springframework:spring-web:jar:4.3.2.RELEASE:compile
[INFO] | \- org.springframework:spring-webmvc:jar:4.3.2.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-jetty:jar:1.4.0.RELEASE:compile
[INFO] | +- org.eclipse.jetty:jetty-servlets:jar:9.3.11.v20160721:compile
[INFO] | | +- org.eclipse.jetty:jetty-continuation:jar:9.3.11.v20160721:compile
[INFO] | | +- org.eclipse.jetty:jetty-http:jar:9.3.11.v20160721:compile
[INFO] | | \- org.eclipse.jetty:jetty-io:jar:9.3.11.v20160721:compile
[INFO] | +- org.eclipse.jetty:jetty-webapp:jar:9.3.11.v20160721:compile
[INFO] | | +- org.eclipse.jetty:jetty-xml:jar:9.3.11.v20160721:compile
[INFO] | | \- org.eclipse.jetty:jetty-servlet:jar:9.3.11.v20160721:compile
[INFO] | | \- org.eclipse.jetty:jetty-security:jar:9.3.11.v20160721:compile
[INFO] | +- org.eclipse.jetty.websocket:websocket-server:jar:9.3.11.v20160721:compile
[INFO] | | +- org.eclipse.jetty.websocket:websocket-common:jar:9.3.11.v20160721:compile
[INFO] | | | \- org.eclipse.jetty.websocket:websocket-api:jar:9.3.11.v20160721:compile
[INFO] | | +- org.eclipse.jetty.websocket:websocket-client:jar:9.3.11.v20160721:compile
[INFO] | | \- org.eclipse.jetty.websocket:websocket-servlet:jar:9.3.11.v20160721:compile
[INFO] | \- org.eclipse.jetty.websocket:javax-websocket-server-impl:jar:9.3.11.v20160721:compile
[INFO] | +- org.eclipse.jetty:jetty-annotations:jar:9.3.11.v20160721:compile
[INFO] | | +- org.eclipse.jetty:jetty-plus:jar:9.3.11.v20160721:compile
[INFO] | | +- javax.annotation:javax.annotation-api:jar:1.2:compile
[INFO] | | +- org.ow2.asm:asm:jar:5.0.1:compile
[INFO] | | \- org.ow2.asm:asm-commons:jar:5.0.1:compile
[INFO] | | \- org.ow2.asm:asm-tree:jar:5.0.1:compile
[INFO] | +- org.eclipse.jetty.websocket:javax-websocket-client-impl:jar:9.3.11.v20160721:compile
[INFO] | \- javax.websocket:javax.websocket-api:jar:1.0:compile
[INFO] +- org.springframework.boot:spring-boot-starter-data-jpa:jar:1.4.0.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-starter-aop:jar:1.4.0.RELEASE:compile
[INFO] | | \- org.aspectj:aspectjweaver:jar:1.8.9:compile
[INFO] | +- org.springframework.boot:spring-boot-starter-jdbc:jar:1.4.0.RELEASE:compile
[INFO] | | +- org.apache.tomcat:tomcat-jdbc:jar:8.5.4:compile
[INFO] | | | \- org.apache.tomcat:tomcat-juli:jar:8.5.4:compile
[INFO] | | \- org.springframework:spring-jdbc:jar:4.3.2.RELEASE:compile
[INFO] | +- org.hibernate:hibernate-core:jar:5.0.9.Final:compile
[INFO] | | +- org.hibernate.javax.persistence:hibernate-jpa-2.1-api:jar:1.0.0.Final:compile
[INFO] | | +- org.javassist:javassist:jar:3.20.0-GA:compile
[INFO] | | +- antlr:antlr:jar:2.7.7:compile
[INFO] | | +- org.jboss:jandex:jar:2.0.0.Final:compile
[INFO] | | +- dom4j:dom4j:jar:1.6.1:compile
[INFO] | | | \- xml-apis:xml-apis:jar:1.4.01:compile
[INFO] | | \- org.hibernate.common:hibernate-commons-annotations:jar:5.0.1.Final:compile
[INFO] | +- org.hibernate:hibernate-entitymanager:jar:5.0.9.Final:compile
[INFO] | +- javax.transaction:javax.transaction-api:jar:1.2:compile
[INFO] | \- org.springframework:spring-aspects:jar:4.3.2.RELEASE:compile
[INFO] +- com.h2database:h2:jar:1.4.192:compile
[INFO] +- org.springframework.boot:spring-boot-starter-test:jar:1.4.0.RELEASE:test
[INFO] | +- org.springframework.boot:spring-boot-test:jar:1.4.0.RELEASE:test
[INFO] | +- org.springframework.boot:spring-boot-test-autoconfigure:jar:1.4.0.RELEASE:test
[INFO] | +- com.jayway.jsonpath:json-path:jar:2.2.0:test
[INFO] | | \- net.minidev:json-smart:jar:2.2.1:test
[INFO] | | \- net.minidev:accessors-smart:jar:1.1:test
[INFO] | +- org.assertj:assertj-core:jar:2.5.0:test
[INFO] | +- org.mockito:mockito-core:jar:1.10.19:test
[INFO] | | \- org.objenesis:objenesis:jar:2.1:test
[INFO] | +- org.hamcrest:hamcrest-core:jar:1.3:compile
[INFO] | +- org.hamcrest:hamcrest-library:jar:1.3:test
[INFO] | +- org.skyscreamer:jsonassert:jar:1.3.0:test
[INFO] | | \- org.json:json:jar:20140107:test
[INFO] | +- org.springframework:spring-core:jar:4.3.2.RELEASE:compile
[INFO] | \- org.springframework:spring-test:jar:4.3.2.RELEASE:test
[INFO] +- org.springframework.boot:spring-boot-starter:jar:1.4.0.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot:jar:1.4.0.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-autoconfigure:jar:1.4.0.RELEASE:compile
[INFO] | \- org.yaml:snakeyaml:jar:1.17:runtime
[INFO] +- org.springframework.boot:spring-boot-starter-log4j2:jar:1.4.0.RELEASE:compile
[INFO] | +- org.apache.logging.log4j:log4j-slf4j-impl:jar:2.6.2:compile
[INFO] | +- org.slf4j:jcl-over-slf4j:jar:1.7.21:compile
[INFO] | \- org.slf4j:jul-to-slf4j:jar:1.7.21:compile
[INFO] +- org.apache.logging.log4j:log4j-api:jar:2.6.2:compile
[INFO] +- org.apache.logging.log4j:log4j-core:jar:2.6.2:compile
[INFO] +- org.apache.commons:commons-lang3:jar:3.3.2:compile
[INFO] +- org.mongodb:mongo-java-driver:jar:2.12.4:compile
[INFO] +- org.springframework.data:spring-data-mongodb:jar:1.9.2.RELEASE:compile
[INFO] | +- org.springframework:spring-tx:jar:4.3.2.RELEASE:compile
[INFO] | +- org.springframework:spring-context:jar:4.3.2.RELEASE:compile
[INFO] | +- org.springframework:spring-beans:jar:4.3.2.RELEASE:compile
[INFO] | +- org.springframework:spring-expression:jar:4.3.2.RELEASE:compile
[INFO] | +- org.springframework.data:spring-data-commons:jar:1.12.2.RELEASE:compile
[INFO] | \- org.slf4j:slf4j-api:jar:1.7.21:compile
[INFO] +- com.google.api-client:google-api-client:jar:1.18.0-rc:compile
[INFO] +- com.google.http-client:google-http-client-Hymanson2:jar:1.18.0-rc:compile
[INFO] | \- com.google.http-client:google-http-client:jar:1.18.0-rc:compile
[INFO] +- com.google.oauth-client:google-oauth-client:jar:1.18.0-rc:compile
[INFO] | \- com.google.code.findbugs:jsr305:jar:1.3.9:compile
[INFO] +- com.fasterxml.Hymanson.core:Hymanson-databind:jar:2.8.2:compile
[INFO] | \- com.fasterxml.Hymanson.core:Hymanson-annotations:jar:2.8.1:compile
[INFO] +- com.google.apis:google-api-services-oauth2:jar:v2-rev81-1.19.0:compile
[INFO] +- com.fasterxml.Hymanson.core:Hymanson-core:jar:2.8.2:compile
[INFO] +- org.mongodb.morphia:morphia:jar:0.107:compile
[INFO] +- org.springframework.security:spring-security-web:jar:4.1.1.RELEASE:compile
[INFO] | +- aopalliance:aopalliance:jar:1.0:compile
[INFO] | \- org.springframework.security:spring-security-core:jar:4.1.1.RELEASE:compile
[INFO] +- org.springframework.security:spring-security-config:jar:4.1.1.RELEASE:compile
[INFO] | \- org.springframework:spring-aop:jar:4.3.2.RELEASE:compile
[INFO] +- org.springframework.social:spring-social-config:jar:1.1.4.RELEASE:compile
[INFO] | \- org.springframework.social:spring-social-web:jar:1.1.4.RELEASE:compile
[INFO] | \- javax.inject:javax.inject:jar:1:compile
[INFO] +- org.springframework.social:spring-social-core:jar:1.1.4.RELEASE:compile
[INFO] +- org.springframework.social:spring-social-facebook:jar:2.0.3.RELEASE:compile
[INFO] +- org.apache.httpcomponents:httpclient:jar:4.3.6:compile
[INFO] | +- org.apache.httpcomponents:httpcore:jar:4.4.5:compile
[INFO] | \- commons-codec:commons-codec:jar:1.10:compile
[INFO] +- org.mockito:mockito-all:jar:1.10.8:compile
[INFO] +- junit:junit:jar:4.11:compile
[INFO] +- org.eclipse.jetty:apache-jsp:jar:9.3.11.v20160721:provided
[INFO] | +- org.eclipse.jetty:jetty-util:jar:9.3.11.v20160721:compile
[INFO] | +- org.eclipse.jetty:jetty-server:jar:9.3.11.v20160721:compile
[INFO] | +- org.eclipse.jetty.toolchain:jetty-schemas:jar:3.1:provided
[INFO] | +- javax.servlet:javax.servlet-api:jar:3.1.0:compile
[INFO] | +- org.mortbay.jasper:apache-jsp:jar:8.0.33:provided
[INFO] | | \- org.mortbay.jasper:apache-el:jar:8.0.33:provided
[INFO] | \- org.eclipse.jdt.core.compiler:ecj:jar:4.4.2:provided
[INFO] +- javax.servlet:jstl:jar:1.2:compile
[INFO] +- org.springframework.data:spring-data-jpa:jar:1.10.2.RELEASE:compile
[INFO] | +- org.springframework:spring-orm:jar:4.3.2.RELEASE:compile
[INFO] | \- org.aspectj:aspectjrt:jar:1.8.9:compile
[INFO] +- postgresql:postgresql:jar:9.1-901-1.jdbc4:compile
[INFO] \- joda-time:joda-time:jar:2.9.4:compile
I have added the standard log4j2.xml-file to src/main/resources/config with the default config:
我已使用默认配置将标准 log4j2.xml 文件添加到 src/main/resources/config：
<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
<Appenders>
<Console name="STDOUT" target="SYSTEM_OUT">
<PatternLayout pattern="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
</Console>
</Appenders>
<Loggers>
<Logger name="org.apache.log4j.xml" level="info"/>
<Root level="debug">
<AppenderRef ref="STDOUT"/>
</Root>
</Loggers>
</Configuration>
Any guesses? I've tried running from within Spring Tool Suite and with the maven spring-boot plugin.
有什么猜测吗？我试过从 Spring Tool Suite 和 maven spring-boot 插件中运行。
By popular request, here is the complete pom.xml:
根据流行的要求，这里是完整的 pom.xml：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.0.RELEASE</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>no.saiboten</groupId>
<artifactId>musikkjulekalender</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>Musikkjulekalender</name>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.6.2</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.6.2</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.3.2</version>
</dependency>
<dependency>
<groupId>org.mongodb</groupId>
<artifactId>mongo-java-driver</artifactId>
<version>2.12.4</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>com.google.api-client</groupId>
<artifactId>google-api-client</artifactId>
<version>1.18.0-rc</version>
</dependency>
<dependency>
<groupId>com.google.http-client</groupId>
<artifactId>google-http-client-Hymanson2</artifactId>
<version>1.18.0-rc</version>
</dependency>
<dependency>
<groupId>com.google.oauth-client</groupId>
<artifactId>google-oauth-client</artifactId>
<version>1.18.0-rc</version>
</dependency>
<dependency>
<groupId>com.fasterxml.Hymanson.core</groupId>
<artifactId>Hymanson-databind</artifactId>
<version>2.8.2</version>
</dependency>
<dependency>
<groupId>com.google.apis</groupId>
<artifactId>google-api-services-oauth2</artifactId>
<version>v2-rev81-1.19.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.Hymanson.core</groupId>
<artifactId>Hymanson-core</artifactId>
<version>2.8.2</version>
</dependency>
<dependency>
<groupId>org.mongodb.morphia</groupId>
<artifactId>morphia</artifactId>
<version>0.107</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-facebook</artifactId>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.3.6</version>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.10.8</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>apache-jsp</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.1-901-1.jdbc4</version>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.9.4</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<useSystemClassLoader>false</useSystemClassLoader>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>https://repo.spring.io/libs-release</url>
</repository>
<repository>
<id>org.jboss.repository.releases</id>
<name>JBoss Maven Release Repository</name>
<url>https://repository.jboss.org/nexus/content/repositories/releases</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>https://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
</project>
回答by asch
It looks your dependencies are correct. This is the pom of working spring-boot application with log4j2 as logging framework:
看起来您的依赖项是正确的。这是使用 log4j2 作为日志框架的工作 spring-boot 应用程序的 pom：
<!-- Spring logging -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
Put your log4j2.xml into resourcefolder for running from eclipse; if you prefer to use the different directory - resource/conf- provide the path to log4j2 configuration with JVM argument like this:
将您的 log4j2.xml 放入资源文件夹以从 Eclipse 运行；如果您更喜欢使用不同的目录 - resource/conf- 使用 JVM 参数提供 log4j2 配置的路径，如下所示：
-Dlog4j.configurationFile=”conf/log4j2.xml”
-Dlog4j.configurationFile=”conf/log4j2.xml”
Do not give up and switch back from logback to log4j2...
不要放弃并从 logback 切换回 log4j2 ...
回答by Remko Popma
That error message is generated by the log4j-api module when it cannot find or load an implementation of its interfaces. Usually this means that the log4j-core module is missing from the classpath, but looking at your dependency graph that doesn't seem to be the case.
该错误消息是由 log4j-api 模块在无法找到或加载其接口的实现时生成的。通常这意味着类路径中缺少 log4j-core 模块，但查看您的依赖关系图似乎并非如此。
There are some transitive dependencies on the log4j-slf4j-impl and log4j-jul modules but I don't think that could cause the error message.
log4j-slf4j-impl 和 log4j-jul 模块有一些传递依赖关系，但我认为这不会导致错误消息。
One way to investigate further is to try starting your application again with this system property set: -Dorg.apache.logging.log4j.simplelog.StatusLogger.level=TRACE. This will print log4j internal debug logging to the console.
进一步研究的一种方法是尝试与这个系统属性设置重新启动您的应用程序：-Dorg.apache.logging.log4j.simplelog.StatusLogger.level=TRACE。这会将 log4j 内部调试日志打印到控制台。
(Once your configuration file is loaded the StatusLogger output level can be controlled by setting <Configuration status="trace">in the beginning of the log4j2.xml configuration file. However, the configuration file is loaded by the log4j-core module, and we're not there yet...)
（一旦你的配置文件被加载，StatusLogger 输出级别可以通过<Configuration status="trace">在 log4j2.xml 配置文件的开头设置来控制。但是，配置文件是由 log4j-core 模块加载的，我们还没有...... .)
回答by jaryur
I looked up the source code of LogManager.classand found the reason was there's no LoggerContextFactoryfound in log4j-provider.propertieswhich should be found in log4j-core.jar/META-INF.
So check your log4j-core.jar/META-INF/log4j-provider.propertiesfile , or you can delete your log4j-core.jarin your local repository.
我查看了LogManager.class的源代码，发现原因是在log4j-provider.properties 中没有找到LoggerContextFactory，而应该在log4j-core.jar/META-INF 中找到。
因此，请检查您的log4j-core.jar/META-INF/log4j-provider.properties文件，或者您可以删除本地存储库中的log4j-core.jar。
回答by Dhiren Solanki
There might be multiple reasons but common reason is you might have wrong JAR (corrupted). Delete JARs from repository and try to download again. It will solve the problem.
可能有多种原因，但常见的原因是您可能有错误的 JAR（已损坏）。从存储库中删除 JAR 并尝试再次下载。它将解决问题。
In my case I have deleted org folder from maven repository {home}.m2\repository\org.
就我而言，我已从 maven 存储库 {home}.m2\repository\org 中删除了 org 文件夹。
I have posted similar question here. Spring boot: ERROR StatusLogger Log4j2 could not find a logging implementation
我在这里发布了类似的问题。 Spring boot：错误 StatusLogger Log4j2 找不到日志记录实现
